Homegrown online marketplace Snapdeal will invest Rs. 350 crore this fiscal year (2014-15) to expand its supply chain infrastructure as it aims for a stronger foothold in India’s internet retail market that is estimated to expand seven-fold to $22 billion by 2018.Besides, the Delhi-based company also seeks to triple its seller base to 100,000 by March 2015, trying to cash in on the rising number of small and medium enterprises (SMEs) turning to the internet to increase sales and presence says Sachin Karpe